class A0 {
private int f=10;
A0( int f) { this.f=f; }
int getF() { return f; }
}
class A1 extends A0 {
private int f=11;
A1( int f) { super(f); }
public int getSuperF() {
return super.getF();
}
}
class B extends A1 {
private int f=12;
B( int f) { super(f); }
int getF() { return f; }
}
public class Exercise {
public static void main(String[]arg) {
B b = new B(7);
System.out.println( b.getF() );
System.out.println( b.getSuperF() );
}
}